comparison base/UnitDatabase.h @ 116:a08718723b20

* Add units repository, and unit property on time-value and note layers.

+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Sonic Visualiser
+    An audio file viewer and annotation editor.
+    Centre for Digital Music, Queen Mary, University of London.
+    This file copyright 2006 Chris Cannam.
+    
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#ifndef _UNIT_DATABASE_H_
+#define _UNIT_DATABASE_H_
+
+#include <QObject>
+#include <QString>
+#include <QStringList>
+#include <map>
+
+// This grandly named class is just a list of the names of known scale
+// units for the various models, for use as the set of fixed values in
+// unit dropdown menus etc.  Of course, the user should be allowed to
+// enter their own as well.
+
+class UnitDatabase : public QObject
+{
+    Q_OBJECT
+
+public:
+    static UnitDatabase *getInstance();
+
+    QStringList getKnownUnits() const;
+    void registerUnit(QString unit);
+    
+    int getUnitId(QString unit);
+    QString getUnitById(int id);
+
+signals:
+    void unitDatabaseChanged();
+
+protected:
+    UnitDatabase();
+
+    typedef std::map<QString, int> UnitMap;
+    UnitMap m_units;
+    int m_nextId;
+
+    static UnitDatabase m_instance;
+};
+
+#endif
+